UPD16448A 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD16448A

SOURCE DRIVER FOR 240-OUTPUT TFT-LCD (NAVIGATION, AUTOMOBILE LCD-TV)

NEC => Renesas Technology 

µPD16448A

2. FUNCTION DESCRIPTION

2.1 Multiplexer Circuit

This circuit selects RGB video signals input to the C1, C2, and C3 pins according to the pixel array of the liquid

crystal panel, and outputs the signals to the H1 through H240 pins.

Vertical stripe array, single-/double-side delta array, or mosaic array can be selected by using the MP/TH and

MP/1.5 pins.

2.1.1 Vertical stripe array mode (MP/TH = L, MP/1.5 = L)

In this mode, the relation between video signals C1, C2, and C3, and output pins is as shown below. This

mode is used to drive a panel of vertical stripe array. In this mode, the multiplexer circuit is in the through

status.

Relation between video signals C1, C2, and C3, and output pins (during right shift)

Line No.

(number of

INHs)

RESET

0

H

1

L

2

L

3

L

:

:

:

:

INH

H1 (H240)

H2 (H239)

H3 (H238)

H4 (H237)

H239 (H2)

H240 (H1)

Sampling Sampling Sampling Sampling

Sampling Sampling

L

C1 (C3)

C2 (C2)

C3 (C1)

C1 (C3)

C2 (C2)

C3 (C1)

Output

Output

Output

Output

Output

Output

↓

C1 (C3)

C2 (C2)

C3 (C1)

C1 (C3)

C2 (C2)

C3 (C1)

Output

Output

Output

Output

Output

Output

↓

C1 (C3)

C2 (C2)

C3 (C1)

C1 (C3)

C2 (C2)

C3 (C1)

Output

Output

Output

Output

Output

Output

↓

C1 (C3)

C2 (C2)

C3 (C1)

C1 (C3)

C2 (C2)

C3 (C1)

:

:

:

:

:

:

:

:

:

:

:

:

:

:

( ) indicates the case of left shift.

Pixel arrangement of vertical stripe array and multiplexer operation

R → C1

B → C2

G → C3

µ PD16448A

H1

H2

Right shift (R/L = "H"), MP/TH = "L", MP/1.5 = "L"

H3

H4

H5

H6

H7

R

B

G

R

B

G

R

R

B

G

R

B

G

R

R

B

G

R

B

G

R

R

B

G

R

B

G

R

R

B

G

R

B

G

R

5

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